Change of Basis
the most confusing thing in linear algebra (don't @ me)
Linear Constant Coefficient ODEs
the most important topic in an ODE class
Integrating Factors Explained
the most common way to solve first order linear ODE's
Bases for the fundamental spaces of a matrix
a lot of students struggle with this so here. row space, column space, null space, and left null space.
Series Solutions Done Quick
the fast way to do series solutions. no reindexing required.